public class Count extends Aggregate
operationargumentEFFECTIVE_BOOLEAN_VALUE, EVALUATE_METHOD, EVENT_FEED_METHOD, INHERITED_CONTEXT, INSPECTION_CONTEXT, ITEM_FEED_METHOD, ITERATE_METHOD, locationId, MAX_SEQUENCE_LENGTH, MAX_STRING_LENGTH, NAVIGATION_CONTEXT, NODE_VALUE_CONTEXT, PROCESS_METHOD, PUSH_SELECTION, staticProperties, UNBOUNDED_LOWER, UNBOUNDED_UPPER, W3C_CONSUMING, W3C_FREE_RANGING, W3C_GROUP_CONSUMING, W3C_MOTIONLESS, WATCH_METHOD| Constructor and Description |
|---|
Count() |
| Modifier and Type | Method and Description |
|---|---|
Sequence |
call(XPathContext context,
Sequence[] arguments)
Evaluate the expression
|
static int |
count(SequenceIterator iter)
Get the number of items in a sequence identified by a SequenceIterator
|
Int64Value |
evaluateItem(XPathContext context)
Evaluate the function
|
ExpressionCompiler |
getExpressionCompiler()
Return the compiler relating to a particular expression
|
int |
getImplementationMethod()
An implementation of Expression must provide at least one of the methods evaluateItem(), iterate(), or process().
|
IntegerValue[] |
getIntegerBounds()
For an expression that returns an integer or a sequence of integers, get
a lower and upper bound on the values of the integers that may be returned, from
static analysis.
|
CountAdjunct |
getStreamingAdjunct()
Get a class that supports streamed evaluation of this expression
|
checkArgumentsaddContextDocumentArgument, addDocToPathMap, bindStaticContext, computeCardinality, computeSpecialProperties, copy, equalOrNull, equals, getContextNode, getConvertingCallable, getDefaultArgumentNode, getDetails, getErrorCodeForTypeErrors, getFunctionItemType, getItemType, getOperation, getRequiredType, iterateSubExpressionInfo, makeSystemFunction, optimize, setDetails, useContextItemAsDefaultaddExternalFunctionCallToPathMap, checkArgumentCount, explain, getArguments, getDisplayName, getExpressionName, getFunctionName, getNumberOfArguments, hashCode, iterateSubExpressions, preEvaluate, promote, replaceSubExpression, setArguments, setFunctionName, simplify, simplifyArguments, toString, typeCheckaddToPathMap, adoptChildExpression, checkForUpdatingSubexpressions, checkPermittedContents, computeDependencies, computeStaticProperties, doPromotion, dynamicError, effectiveBooleanValue, evaluateAsString, evaluatePendingUpdates, explain, getCardinality, getColumnNumber, getColumnNumber, getConstructType, getContainer, getDependencies, getEvaluationMethod, getExecutable, getHostLanguage, getIntrinsicDependencies, getLineNumber, getLineNumber, getLocationId, getLocationProvider, getObjectName, getProperties, getProperty, getPublicId, getSlotsUsed, getSpecialProperties, getStreamability, getSystemId, getSystemId, hasVariableBinding, implementsStaticTypeCheck, isSubtreeExpression, isUpdatingExpression, isVacuousExpression, iterate, iterateEvents, markTailFunctionCalls, process, resetLocalStaticProperties, setContainer, setEvaluationMethod, setFiltered, setFlattened, setLocationId, staticTypeCheck, suppressValidation, toPattern, toStreamingPattern, typeErrorpublic int getImplementationMethod()
SystemFunctionCallgetImplementationMethod in class SystemFunctionCallExpression.ITERATE_METHOD or Expression.EVALUATE_METHOD or
Expression.PROCESS_METHODpublic IntegerValue[] getIntegerBounds()
getIntegerBounds in class Expressionpublic CountAdjunct getStreamingAdjunct()
getStreamingAdjunct in class Expressionpublic Int64Value evaluateItem(XPathContext context) throws XPathException
evaluateItem in class Expressioncontext - The context in which the expression is to be evaluatedXPathException - if any dynamic error occurs evaluating the
expressionpublic static int count(SequenceIterator iter) throws XPathException
iter - The SequenceIterator. This method moves the current position
of the supplied iterator; if this isn't safe, make a copy of the iterator
first by calling getAnother(). The supplied iterator must be positioned
before the first item (there must have been no call on next()).XPathException - if a failure occurs reading the input sequencepublic Sequence call(XPathContext context, Sequence[] arguments) throws XPathException
context - the dynamic evaluation contextarguments - the values of the arguments, supplied as SequencesXPathException - if a dynamic error occurs during the evaluation of the expressionpublic ExpressionCompiler getExpressionCompiler() throws CannotCompileException
ExpressiongetExpressionCompiler in class ExpressionCannotCompileException - if it is not possible to generate bytecode for this expressionCopyright (c) 2004-2013 Saxonica Limited. All rights reserved.